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arXiv · hep-ph/0008116

Couplings of a Light Dilaton and Violations of the Equivalence Principle

David B. Kaplan·Mark B. Wise
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Abstract

Experimental discovery of the dilaton would provide strong evidence for string theory. A light dilaton could show up in current tests of the inverse square law for gravity at sub-millimeter distances. In the large extra dimension scenario, Kaluza-Klein excitations of the dilaton can also contribute to the cooling of supernovae. In order to quantify these effects we compute the couplings of a low energy dilaton to matter. These predominantly arise from the fundamental dilaton coupling to the gluon field strength, which receives a sizable enhancement from QCD scaling. We show that detection of the dilaton will give a direct measurement of the QCD coupling constant at the string scale. Particular attention is paid to the size of equivalence principle violating dilaton couplings.

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David B. Kaplan, Mark B. Wise. 2000-08-11. Couplings of a Light Dilaton and Violations of the Equivalence Principle. https://doi.org/10.1088/1126-6708%2F2000%2F08%2F037

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